Fabricated box-type transformer foundation

Abstract

The utility model discloses an assembly type box-type transformer foundation, and belongs to the technical field of prefabricated pipe galleries. Comprising a bottom plate, a lower foundation and an upper foundation, the bottom plate and the lower foundation are connected through a plurality of locking structures, and the lower foundation and the upper foundation are connected through a plurality of locking structures. The locking structure comprises a bolt, a nut, a long bolt mounting gap and a short nut mounting gap; the long bolt mounting notch is formed in the upper part or the lower part of the outer wall of the lower foundation, a through hole is formed between the long bolt mounting notch and the corresponding end of the lower foundation, and a bolt can be placed in the through hole; the short nut mounting notch is formed in the lower part of the outer wall of the upper foundation or the side edge of the bottom plate and is positioned right below or right above the long bolt mounting notch, a through hole is formed between the short nut mounting notch and the upper end of the bottom plate or the lower end of the upper foundation, and a nut can be placed in the through hole; during locking, the nut is positioned in the short nut mounting gap; a bolt is placed in from the long bolt installation notch and penetrates through the through hole upwards or downwards, and the upper end or the lower end of the bolt extends into the short nut installation notch and is locked by a nut.

Description

Technical Field

[0001] The utility model belongs to the technical field of prefabricated pipe gallery, and particularly relates to an assembled box-type transformer foundation. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are primary coil, secondary coil and iron core. Its main functions include voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization, etc.; according to its use, it can be divided into: distribution transformer, power transformer, fully sealed transformer, combined transformer, dry-type transformer, oil-immersed transformer, single-phase transformer, electric furnace transformer, rectifier transformer, reactor, anti-interference transformer, lightning protection transformer, box-type transformer test transformer, corner transformer, high current transformer, excitation transformer, etc.

[0003] Box-type substations are suitable for residential areas, urban public substations, bustling downtown areas, construction power supplies, etc. Users can choose box-type transformers according to different usage conditions and load levels. Box-type transformers need to be set on the corresponding basis.

[0004] For example, the patent with application number CN202210427679.7 discloses a 110kV transformer low-voltage side outgoing cable connection cabinet, including a cabinet body, three circular holes are arranged at equal intervals on the north side of the cabinet body, each circular hole is installed with a high-voltage wall bushing through a stainless steel bolt, and the external terminal of the high-voltage wall bushing is connected to the transformer low-voltage tank oil-filled bushing through a three-phase copper busbar, and yellow, green and red high-voltage heat shrinkable bushings are installed in turn on the three high-voltage wall bushings; a Open the cabinet door to separate the cabinet into a left box and a right box. The left box is equipped with a three-phase copper busbar and internal wiring terminals of the high-voltage wall bushing. A valve-shaped lightning arrester is connected to the lower end of the three-phase copper busbar to instantly introduce the external high voltage generated by external lightning into the substation grounding electrode at the bottom of the cabinet; multiple rows of waterproof heat dissipation holes are arranged on the west side of the cabinet, and a stainless steel filter is installed inside; an openable cabinet door is installed on the east side of the cabinet, and multiple European-style touchable cable connectors are arranged in the cabinet to allow the high-voltage cable to enter the cable well.

[0005] For example, the patent with application number CN201720005678.8 discloses a prefabricated substation, including a box body, in which a low-voltage chamber, a transformer chamber and a high-voltage chamber are arranged side by side in sequence, the top of the box body is a double-layer box top, a heat-insulating air layer is arranged in the middle of the box top, and the bottom of the box body is an integrated base; cooling air inlets and outlets are respectively arranged at the base positions corresponding to the bottom of the low-voltage chamber, the transformer chamber and the high-voltage chamber, a basic platform is arranged at the lower edge of the base, the basic platform is arranged on the ground, and is connected to the lower edge of the base through channel steel, a vent is arranged on the side of the basic platform, and a shutter and a protective net are installed on the vent, a cable room is arranged under the ground directly below the base for placing incoming and outgoing cables, and the incoming and outgoing cables are connected to the box body through the base; the high-voltage chamber is provided with a high-voltage chamber switch door on the side of the box body, with the high-voltage chamber switch door as the front, and a high-voltage chamber incoming line cabinet, a high-voltage chamber first outgoing line cabinet and a high-voltage chamber second outgoing line cabinet are arranged side by side in sequence in the high-voltage chamber, and the high-voltage chamber The bottom of the incoming line cabinet is connected to the incoming line cable, the high-voltage room incoming line cabinet, the first outgoing line cabinet of the high-voltage room and the second outgoing line cabinet of the high-voltage room are electrically connected in sequence, and the upper parts of the first outgoing line cabinet of the high-voltage room and the second outgoing line cabinet of the high-voltage room are electrically connected to the transformer in the transformer room; the low-voltage room is provided with a low-voltage room switch door on the side of the box body, with the low-voltage room switch door as the front, and the low-voltage room incoming line cabinet, the low-voltage room outgoing line cabinet and the capacitor cabinet are arranged side by side in sequence in the low-voltage room, the bottom of the low-voltage room incoming line cabinet is electrically connected to the transformer, and the low-voltage room incoming line cabinet is electrically connected to the transformer. The cabinet, the low-voltage room outlet cabinet and the capacitor cabinet are electrically connected in sequence; the low-voltage room incoming cabinet, the low-voltage room outlet cabinet and the capacitor cabinet are respectively provided with partition plates, and the partition plates separate the low-voltage room incoming cabinet, the low-voltage room outlet cabinet and the capacitor cabinet into two parts, the upper part of the low-voltage room incoming cabinet is a metering room, and the lower part is provided with a drawer-type circuit breaker; the upper part of the low-voltage room outlet cabinet is provided with an AC ammeter, and the lower part is provided with a molded case circuit breaker and a first knife switch; the upper part of the capacitor cabinet is provided with a capacitor controller, and the lower part is provided with an intelligent capacitor and a second knife switch.

[0006] As described in patent CN201720005678.8, the existing assembled box-type transformer foundation includes a bottom plate, a lower foundation and an upper foundation arranged in sequence from bottom to top, and the upper foundation is exposed to the ground. In the prior art, the above three structures are usually connected by a connection structure between the lower foundation and the inner wall of the upper foundation (such as a connection plate vertically arranged on the bottom plate (the lower end is fixed to the embedded part on the bottom plate), and a plurality of bolts are arranged side by side on the connection plate to connect with the lower foundation and the upper foundation).

[0007] The existing connection structure has a complicated installation process and is not convenient for on-site operation. Utility Model Content

[0008] In order to solve the above problems, the embodiment of the utility model provides an assembled box-type transformer foundation, which can be installed only by bolts and nuts, and is easy to install. The technical solution is as follows:

[0009] The utility model provides an assembled box-type transformer foundation, comprising a bottom plate 1, a lower foundation 2 and an upper foundation 3 arranged in sequence from bottom to top; the bottom plate 1 and the lower foundation 2 and the lower foundation 2 and the upper foundation 3 are connected by a plurality of locking structures; the locking structures include bolts 4, nuts 5, long bolt installation notches 6 and short nut installation notches 7; the long bolt installation notches 6 are arranged vertically, and are arranged at the upper or lower part of the outer wall of the lower foundation 2, and a through hole 12 for the bolt 4 to pass through is provided between the corresponding end of the long bolt installation notch 6 and the lower foundation 2 in the vertical direction, which can be placed in the bolt 4. The short nut mounting notch 7 is arranged at the lower part of the outer wall of the upper foundation 3 or on the side of the base plate 1, which is located directly below or above the long bolt mounting notch 6, and a through hole 12 for the bolt 4 to pass through is provided between the short nut mounting notch 7 and the upper end of the base plate 1 or the lower end of the upper foundation 3 in the vertical direction, so that the nut 5 can be inserted therein; when tightening, the nut 5 is located in the short nut mounting notch 7; the bolt 4 is inserted from the long bolt mounting notch 6, with its head located at the end away from the corresponding short nut mounting notch 7, and it passes through the through hole 12 upward or downward, and its upper end or lower end reaches the short nut mounting notch 7 and is tightened by the nut 5.

[0010] Among them, the lower foundation 2 and the upper foundation 3 in the embodiment of the utility model are rectangular cylindrical structures that cooperate with each other, and the bottom plate 1 is a rectangular plate that cooperates with the lower foundation 2; the corresponding sides of the bottom plate 1, the lower foundation 2 and the upper foundation 3 are aligned.

[0011] Furthermore, the lower foundation 2 in the embodiment of the utility model is buried underground, and is arranged in the front-to-back direction, with high-voltage cable inlet and outlet 8 and low-voltage cable inlet and outlet 9 respectively provided on its front and rear sides; the upper foundation 3 is exposed to the ground, and is provided with an exhaust window 10 and a mounting channel steel 11 on its top.

[0012] Specifically, a plurality of locking structures are arranged side by side front and back on both the left and right sides of the foundation of the assembled box-type transformer in the embodiment of the utility model.

[0013] Specifically, the height of the upper foundation 3 in the embodiment of the utility model is 400-600 mm.

[0014] Furthermore, sealing structures are provided between the bottom plate 1 and the lower foundation 2 and between the lower foundation 2 and the upper foundation 3 in the embodiment of the utility model.

[0015] Among them, the length of the long bolt mounting notch 6 in the embodiment of the utility model is greater than the length of the bolt 4, the distance between the side close to the corresponding short nut mounting notch 7 and the side of the short nut mounting notch 7 away from the long bolt mounting notch 6 is greater than the screw length of the bolt 4, and its width is greater than the diameter of the head of the bolt 4; the width of the short nut mounting notch 7 is greater than the diameter of the nut 5.

[0016] Specifically, the upper and lower parts of the lower foundation 2 in the embodiment of the utility model are respectively provided with a plurality of upper long bolt mounting notches 61 and lower long bolt mounting notches 62, the lower part of the upper foundation 3 is provided with a plurality of upper short nut mounting notches 71, and the bottom plate 1 is provided with a plurality of lower short nut mounting notches 72; the upper long bolt mounting notches 61 are located directly below the corresponding upper short nut mounting notches 71 and an upper bolt is provided between the upper long bolt mounting notches 61 and the corresponding upper short nut mounting notches 71, the lower long bolt mounting notches 62 are located directly above the corresponding lower short nut mounting notches 72 and A lower bolt is provided between it and the corresponding lower short nut mounting notch 72, and the upper sides of the upper long bolt mounting notch 61 and the lower short nut mounting notch 72 are both provided with a through hole 12, and the lower sides of the lower long bolt mounting notch 62 and the upper short nut mounting notch 71 are both provided with a through hole 12; the upper bolt is arranged upward, and its head rests on the upper side of the upper long bolt mounting notch 61, and its upper end is located in the upper short nut mounting notch 71; the lower bolt is arranged downward, and its head rests on the lower side of the lower long bolt mounting notch 62, and its lower end is located in the lower short nut mounting notch 72.

[0017] Preferably, the long bolt mounting notch 6 and the short nut mounting notch 7 in the embodiment of the utility model are both vertically arranged rectangular notches; the upper side of the upper long bolt mounting notch 61 is a horizontal side, and the other three sides are beveled sides; the lower side of the lower long bolt mounting notch 62 is a horizontal side, and the other three sides are beveled sides; the lower side of the upper short nut mounting notch 71 is a horizontal side, and the other three sides are beveled sides; the upper side of the lower short nut mounting notch 72 is a horizontal side, and the other three sides are beveled sides; the beveled sides are arranged obliquely from the outside to the inside toward the center of the rectangular notch.

[0018] Specifically, the specification of the bolt 4 in the embodiment of the utility model is M16, and its length is 340mm; the width of the long bolt mounting notch 6 and the short nut mounting notch 7 are the same and both are greater than 80mm, the length of the long bolt mounting notch 6 is greater than 340mm, and the length of the short nut mounting notch 7 is greater than 80mm.

[0019] The beneficial effects of the technical solution provided by the embodiment of the utility model are as follows: the embodiment of the utility model provides an assembled box-type transformer foundation, which can be installed only by bolts and nuts, and is easy to install. Specifically, in this embodiment, installation can be achieved by only 12 bolts and 12 nuts. In addition, the locking structure can be installed outside the assembled box-type transformer foundation without entering the foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the foundation of the assembled box-type transformer provided by the embodiment of the utility model;

[0021] Figure 2 It is a top view of the foundation of the assembled box-type transformer provided by the embodiment of the utility model;

[0022] Figure 3 It is a front view of the foundation of the assembled box-type transformer provided by the embodiment of the utility model;

[0023] Figure 4 It is a rear view of the assembled box-type transformer foundation provided by the embodiment of the utility model;

[0024] Figure 5 It is a dimensioning diagram of the foundation of the assembled box-type transformer provided by the embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of the locking structure.

[0026] In the figure: 1 bottom plate, 2 lower foundation, 3 upper foundation, 4 bolts, 5 nuts, 6 long bolt installation notch, 7 short nut installation notch, 8 high voltage cable inlet and outlet, 9 low voltage cable inlet and outlet, 10 exhaust window, 11 installation channel steel, 12 through hole;

[0027] 61 upper long bolt installation notch, 62 lower long bolt installation notch;

[0028] 71 is an upper short nut installation notch, 72 is a lower short nut installation notch. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] See also Figure 1-6Embodiment 1 provides an assembled box-type transformer foundation, including a bottom plate 1, a lower foundation 2, and an upper foundation 3, etc., which are arranged in sequence from bottom to top. The bottom plate 1, the lower foundation 2, and the upper foundation 3 are all concrete structures with steel bars. The lower foundation 2 and the upper foundation 3 are rectangular cylindrical structures that cooperate with each other, and the bottom plate 1 is a rectangular plate that cooperates with the lower foundation 2. The corresponding sides of the bottom plate 1, the lower foundation 2, and the upper foundation 3 are aligned. The lower foundation 2 is buried underground, and it is arranged in the front-to-back direction. The front and rear sides are respectively provided with a high-voltage cable inlet and outlet 8 (specifically, it can be a rectangular hole) and a low-voltage cable inlet and outlet 9 (specifically, it can be a plurality of circular holes). The upper foundation 3 is exposed to the ground, and an exhaust window 10 (specifically, a plurality of rectangular holes, specifically, two exhaust windows 10 are arranged side by side on the left and right sides, and an exhaust window 10 is arranged on the front and rear sides), and a mounting channel steel 11 (used to install the box-type transformer, and cooperate with the bottom of the box-type transformer) is provided on the top, and its height is 400-600mm. The bottom plate 1 and the lower foundation 2 and the lower foundation 2 and the upper foundation 3 are connected by multiple locking structures. Specifically, multiple locking structures are arranged side by side on both sides of the left and right sides of the assembled box-type transformer foundation. A sealing structure (specifically, it can be a sealant, waterproof glue or a water-swelling water stop strip, etc.) is provided between the bottom plate 1 and the lower foundation 2 and between the lower foundation 2 and the upper foundation 3 to achieve sealing at the connection.

[0032] The locking structure includes bolts 4, nuts 5 (gaskets may also be provided as needed), long bolt installation notches 6 and short nut installation notches 7. The long bolt installation notch 6 is vertically arranged, and is arranged at the upper or lower part of the outer wall of the lower foundation 2. A through hole 12 (specifically a circular hole, the diameter of which is slightly larger than the diameter of the screw rod of the bolt 4) is provided between the corresponding end of the long bolt installation notch 6 and the lower foundation 2 in the vertical direction for the bolt 4 to pass through, and the bolt 4 can be inserted into the notch. The short nut installation notch 7 is arranged at the lower part of the outer wall of the upper foundation 3 or on the side of the bottom plate 1, and is located directly below or directly above the long bolt installation notch 6. A through hole 12 (specifically a circular hole, the diameter of which is slightly larger than the diameter of the screw rod of the bolt 4) is provided between the long bolt installation notch 6 and the upper end of the bottom plate 1 or the lower end of the upper foundation 3 in the vertical direction for the bolt 4 to pass through, and the nut 5 can be inserted into the notch (and also to facilitate the tightening operation of the nut 5). The length of the long bolt installation notch 6 is greater than the length of the bolt 4, the distance between the side close to the corresponding short nut installation notch 7 and the side of the short nut installation notch 7 away from the long bolt installation notch 6 is greater than the screw length of the bolt 4, and its width is greater than the diameter of the head of the bolt 4. The width of the short nut installation notch 7 is greater than the diameter of the nut 5.

[0033] The through hole 12, the long bolt installation notch 6 and the short nut installation notch 7 are all formed during molding.

[0034] When locked, the nut 5 is located in the short nut installation notch 7. The bolt 4 is inserted from the long bolt installation notch 6, with its head located at the end away from the corresponding short nut installation notch 7, and it passes through the through hole 12 upward or downward, and its upper end or lower end is in the short nut installation notch 7 and is locked by the nut 5.

[0035] Example 2

[0036] See also Figure 5 , Example 2 provides an assembled box-type transformer foundation, and its structure is basically the same as that of Example 1, except that: the dimensions of the bottom plate 1 in this embodiment are: 3700mm long, 2300mm wide, and 200mm thick. The dimensions of the lower foundation 2 are: 3700mm long, 2300mm wide, 1200mm high, and 180mm thick. The dimensions of the upper foundation 3 are: 3700mm long, 2300mm wide, 500mm high, and 180mm thick. Correspondingly, the dimensions of the box-type transformer are: 3600mm long and 220mm wide. The number of exhaust windows 10 in this embodiment is four, and two exhaust windows 10 are arranged side by side on the left and right sides of the upper foundation 3. The number of locking structures is six, and three locking structures are arranged side by side on the left and right sides of the assembled box-type transformer foundation.

[0037] Of course, the assembled box-type transformer foundation in this embodiment can also be of other sizes.

[0038] Example 3

[0039] See also Figure 1-6Embodiment 3 provides an assembled box-type transformer foundation, and its structure is basically the same as that of Embodiment 1, except that: the upper and lower parts of the lower foundation 2 in this embodiment are respectively provided with a plurality of upper long bolt installation notches 61 and lower long bolt installation notches 62. The plurality of upper long bolt installation notches 61 are located on the same horizontal plane, and are arranged on the left and right sides of the lower foundation 2. The lower part of the upper foundation 3 is provided with a plurality of upper short nut installation notches 71. The plurality of upper short nut installation notches 71 are located on the same horizontal plane, and are arranged on the left and right sides of the upper foundation 3. The bottom plate 1 is provided with a plurality of lower short nut installation notches 72, and the plurality of lower short nut installation notches 72 are located on the same horizontal plane, and are arranged on the left and right sides of the bottom plate 1. The upper long bolt installation notch 61 is located directly below the corresponding upper short nut installation notch 71, and an upper bolt is arranged between it and the corresponding upper short nut installation notch 71, and the lower long bolt installation notch 62 is located directly above the corresponding lower short nut installation notch 72, and a lower bolt is arranged between it and the corresponding lower short nut installation notch 72. The upper sides of the upper long bolt installation notch 61 and the lower short nut installation notch 72 are both provided with through holes 12, and the lower sides of the lower long bolt installation notch 62 and the upper short nut installation notch 71 are both provided with through holes 12. The through holes 12 are located at the midline of the long bolt installation notch 6 or the short nut installation notch 7. The upper bolt is arranged upward, its head abuts against the upper side of the upper long bolt installation notch 61, and its upper end is located in the upper short nut installation notch 71. The lower bolt is arranged downward, its head abuts against the lower side of the lower long bolt installation notch 62, and its lower end is located in the lower short nut installation notch 72.

[0040] Preferably, the long bolt installation notch 6 and the short nut installation notch 7 in the embodiment of the utility model are both vertically arranged rectangular notches. The upper side of the upper long bolt installation notch 61 is a horizontal side, and the other three sides are beveled sides. The lower side of the lower long bolt installation notch 62 is a horizontal side, and the other three sides are beveled sides. The lower side of the upper short nut installation notch 71 is a horizontal side, and the other three sides are beveled sides. The upper side of the lower short nut installation notch 72 is a horizontal side, and the other three sides are beveled sides. The beveled side is arranged obliquely from the outside to the inside toward the center of the rectangular notch, and the beveled side is arranged to facilitate demoulding.

[0041] Example 4

[0042] See also Figure 5 Embodiment 4 provides an assembled box-type transformer foundation, and its structure is basically the same as that of Embodiment 1, except that: the specification of the bolt 4 in this embodiment is M16, and its length is 340 mm. The widths of the long bolt installation gap 6 and the short nut installation gap 7 are the same and both are greater than 80 mm (specifically 135 mm), the length of the long bolt installation gap 6 is greater than 340 mm (specifically 345 mm), the length of the short nut installation gap 7 is greater than 80 mm (specifically 143 mm), and the depths of the long bolt installation gap 6 and the short nut installation gap 7 are both 100 mm.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled box-type transformer foundation, comprising a bottom plate (1), a lower foundation (2) and an upper foundation (3) arranged in sequence from bottom to top; characterized in that: The base plate (1) and the lower foundation (2) and the lower foundation (2) and the upper foundation (3) are connected via a plurality of locking structures; the locking structures include bolts (4), nuts (5), long bolt mounting notches (6) and short nut mounting notches (7); the long bolt mounting notches (6) are arranged vertically, and are arranged at the upper or lower part of the outer wall of the lower foundation (2); a through hole (12) for the bolt (4) to pass through is arranged between the corresponding end of the long bolt mounting notch (6) and the lower foundation (2), and the through hole (12) can be inserted into the bolt (4); the short nut mounting notch (7) is arranged at the lower or lower part of the outer wall of the upper foundation (3); On the side of the base plate (1), it is located just below or just above the long bolt installation notch (6), and a through hole (12) for the bolt (4) to pass through is provided between it and the upper end of the base plate (1) or the lower end of the upper foundation (3) in the vertical direction, and the nut (5) can be inserted into it; when locking, the nut (5) is located in the short nut installation notch (7); the bolt (4) is inserted from the long bolt installation notch (6), and its head is located at the end away from the corresponding short nut installation notch (7), and it passes through the through hole (12) upward or downward, and its upper end or lower end reaches the short nut installation notch (7) and is locked by the nut (5).

2. The assembled box-type transformer foundation according to claim 1 is characterized in that: The lower foundation (2) and the upper foundation (3) are rectangular cylindrical structures that cooperate with each other, and the bottom plate (1) is a rectangular plate that cooperates with the lower foundation (2); the corresponding sides of the bottom plate (1), the lower foundation (2) and the upper foundation (3) are all aligned.

3. The assembled box-type transformer foundation according to claim 2 is characterized in that: The lower foundation (2) is buried underground and arranged in the front-to-back direction, and a high-voltage cable inlet and outlet (8) and a low-voltage cable inlet and outlet (9) are respectively arranged on the front and back sides; the upper foundation (3) is exposed above the ground and is provided with an exhaust window (10) and a mounting channel steel (11) on the top.

4. The assembled box-type transformer foundation according to claim 3 is characterized in that: The left and right sides of the assembled box-type transformer foundation are both provided with a plurality of locking structures arranged side by side front and back.

5. The assembled box-type transformer foundation according to claim 1 is characterized in that: The height of the upper foundation (3) is 400-600 mm.

6. The assembled box-type transformer foundation according to claim 1, characterized in that: Sealing structures are provided between the bottom plate (1) and the lower foundation (2) and between the lower foundation (2) and the upper foundation (3).

7. The assembled box-type transformer foundation according to claim 1, characterized in that: The length of the long bolt mounting notch (6) is greater than the length of the bolt (4); the distance between the side close to the corresponding short nut mounting notch (7) and the side of the short nut mounting notch (7) away from the long bolt mounting notch (6) is greater than the length of the screw rod of the bolt (4); and the width of the short nut mounting notch (7) is greater than the diameter of the head of the bolt (4); and the width of the short nut mounting notch (7) is greater than the diameter of the nut (5).

8. The assembled box-type transformer foundation according to claim 1, characterized in that: The upper and lower parts of the lower foundation (2) are respectively provided with a plurality of upper long bolt mounting notches (61) and lower long bolt mounting notches (62); the lower part of the upper foundation (3) is provided with a plurality of upper short nut mounting notches (71); and the bottom plate (1) is provided with a plurality of lower short nut mounting notches (72); the upper long bolt mounting notches (61) are located directly below the corresponding upper short nut mounting notches (71) and an upper bolt is provided between the upper long bolt mounting notches and the corresponding upper short nut mounting notches (71); the lower long bolt mounting notches (62) are located directly above the corresponding lower short nut mounting notches (72) and the upper short nut mounting notches are provided between the upper long bolt mounting notches and the corresponding lower short nut mounting notches A lower bolt is arranged between the lower short nut mounting notch (72); the upper sides of the upper long bolt mounting notch (61) and the lower short nut mounting notch (72) are both provided with through holes (12); the lower sides of the lower long bolt mounting notch (62) and the upper short nut mounting notch (71) are both provided with through holes (12); the upper bolt is arranged upward, its head abuts against the upper side of the upper long bolt mounting notch (61), and its upper end is located in the upper short nut mounting notch (71); the lower bolt is arranged downward, its head abuts against the lower side of the lower long bolt mounting notch (62), and its lower end is located in the lower short nut mounting notch (72).

9. The assembled box-type transformer foundation according to claim 8, characterized in that: The long bolt installation notch (6) and the short nut installation notch (7) are both vertically arranged rectangular notches; the upper side of the upper long bolt installation notch (61) is a horizontal side, and the other three sides are beveled sides; the lower side of the lower long bolt installation notch (62) is a horizontal side, and the other three sides are beveled sides; the lower side of the upper short nut installation notch (71) is a horizontal side, and the other three sides are beveled sides; the upper side of the lower short nut installation notch (72) is a horizontal side, and the other three sides are beveled sides; the beveled sides are arranged obliquely from the outside to the inside toward the center of the rectangular notch.

10. The assembled box-type transformer foundation according to claim 9, characterized in that: The specification of the bolt (4) is M16, and its length is 340 mm; the width of the long bolt installation gap (6) and the short nut installation gap (7) are the same and both are greater than 80 mm, the length of the long bolt installation gap (6) is greater than 340 mm, and the length of the short nut installation gap (7) is greater than 80 mm.

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